Method of selecting an optimal viewing angle position for a camera
a technology of optimal viewing angle and camera, which is applied in the field of method and system for selecting optimal viewing angle position of camera, can solve the problems of insufficient computer vision applications, placement of cameras, and only successful approaches
Active Publication Date: 2014-02-25
KONINK PHILIPS ELECTRONICS NV
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- Description
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- Application Information
AI Technical Summary
Benefits of technology
The patent text provides guidance for setting up a camera for computer vision systems in a user-friendly and automatic way. It also suggests an economical solution by suggesting that fewer cameras may be needed due to each camera being able to optimize its viewing angle.
Problems solved by technology
A critical issue in this and many other computer vision applications is the placement of the cameras.
These approaches are however only successful when the objects of interest do not occlude each other.
They are however inadequate for many computer vision applications.
Nearly all computer vision systems face a fundamental challenge, namely how to determine an optimal camera setup.
This problem becomes especially relevant when the end-users themselves have to position the camera, instead of an expert.
However, there are considerable downsides of this approach, such as the additional costs relating to installing additional cameras, and the additional effort required to install them.
Method used
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[0028]FIG. 1 shows flowchart of an embodiment of a method according to the present invention of selecting an optimal viewing angle position for a camera but the camera can as an example a security camera, a web camera, any kind of analog or digital camera.
[0029]In step (S1) 101, a first quantitative score is determined for a first viewing angle position of the camera, where pre-selected regions of interest are used as reference areas. This step of determining is performed in accordance to a pre-defined quantitative score rule. In one embodiment, this quantitative score rule is based on determining whether there is an overlap amongst the regions of interest for the first and the at least one second viewing angle positions. As an example, one region of interest could be a door frame and a second region of interest could be a table. An optimal angle position is where the door frame and the table do not overlap. Therefore, if these two regions of interest overlap the quantitative score ...
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This invention relates to a method of selecting an optimal viewing angle position for a camera. A first quantitative score is determined for a first viewing angle position of the camera using pre-selected regions of interest as reference areas, the determining being performed in accordance to a pre-defined quantitative score rule. The angle position is adjusted from the first viewing angle position towards at least one second viewing angle position. For each at least one second viewing angle position a second quantitative score is determined in accordance to the pre-defined quantitative score rule, and finally a target viewing angle position is determined based on the determined quantitative scores.
Description
FIELD OF THE INVENTION[0001]The present invention relates to a method and a system for selecting an optimal viewing angle position for a camera.BACKGROUND OF THE INVENTION[0002]Computer vision or visual scene analysis is the scientific field of extracting information from images such as video sequences. The discipline is applied to a large number of applications, for instance for human visual activity recognition, the identification of human activities based on video data captured through one or more cameras.[0003]A critical issue in this and many other computer vision applications is the placement of the cameras. As video sequences are projections of 3D space onto a 2D image plane by a camera, the camera setup (the position and the viewing angle) determines whether the captured video material is suitable for the computer vision task or not. For an application to function optimally, it is important that the camera is positioned in the best possible manner for that particular applica...
Claims
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IPC IPC(8): H04N13/00
CPCG06T2207/10016G06T2207/30244G06T7/0044G06T7/74
InventorPIJL, MARTEN JEROENSHAN, CAIFENGWANG, LUVAN DE PAR, STEVEN LEONARDUS JOSEPHUS DIMPHINA ELISABETH
OwnerKONINK PHILIPS ELECTRONICS NV